51 lines
947 B
Go
51 lines
947 B
Go
package node
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import (
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"github.com/z7zmey/php-parser/position"
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"github.com/z7zmey/php-parser/walker"
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)
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// Nullable node
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type Nullable struct {
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Position *position.Position
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Expr Node
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}
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// NewNullable node constructor
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func NewNullable(Expression Node) *Nullable {
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return &Nullable{
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Expr: Expression,
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}
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}
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// SetPosition sets node position
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func (n *Nullable) SetPosition(p *position.Position) {
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n.Position = p
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}
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// GetPosition returns node positions
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func (n *Nullable) GetPosition() *position.Position {
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return n.Position
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}
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// Attributes returns node attributes as map
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func (n *Nullable) Attributes() map[string]interface{} {
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return nil
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}
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// Walk traverses nodes
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// Walk is invoked recursively until v.EnterNode returns true
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func (n *Nullable) Walk(v walker.Visitor) {
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if v.EnterNode(n) == false {
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return
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}
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if n.Expr != nil {
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v.EnterChildNode("Expr", n)
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n.Expr.Walk(v)
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v.LeaveChildNode("Expr", n)
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}
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v.LeaveNode(n)
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}
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